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Isolation and Identification of Hydrocarbon-Degrading Bacteria from Polychaete Marphysa moribidii 莫里比多毛藻烃类降解菌的分离与鉴定
Q3 Environmental Science Pub Date : 2021-12-17 DOI: 10.15578/squalen.567
Fazilah Arifin, R. Razali, V. Sevakumaran
Marine contamination caused by anthropogenic activities has side effects and causes severe contamination to the environment. Polychaetes are benthic organisms that live in the sediment and can be a good indicator of sediment contamination by organic compounds. In this study, bacterial strains were isolated and identified from the gut of polychaete worm Marphysa moribidii and the potential of the bacteria was evaluated to degrade hydrocarbon compounds. The isolated bacteria were primary and secondary screened on Minimal Salt Media (MSM) agar supplemented with 1% v/v of diesel oil. Diesel degradation analysis was performed by inoculating potential bacterium into MSM broth with 1% v/v diesel oil and incubated at 37 oC for 20 days. Diesel degradation percentage was analyzed using the gravimetric method, while the bacteria cell densities were measured using the standard plate count method. Then, the selected isolates were identified based on their morphological characteristics and 16S rDNA sequences. As a result, two bacteria isolates coded as Isolate 6 and Isolate 8 were able to degrade diesel oil up to 52.29% and 39.24% after 20 days of incubation. The 16S rDNA sequence analysis revealed that it was identified as Bacillus sp. strain UMTFA1 (RB) and Staphylococcus kloosii strain UMTFA2 (RS). Our result showed that these strains have the potential in oil-degrading processes, which will provide new insight into bioremediation process and decrease environmental pollution in soil and water contaminated with hydrocarbons.
人为活动造成的海洋污染具有副作用,对环境造成严重污染。多毛体是生活在沉积物中的底栖生物,可以很好地指示沉积物受到有机化合物的污染。本研究从多毛类蠕虫Marphysa moribidii肠道中分离鉴定了一株细菌,并评价了该细菌降解烃类化合物的潜力。在添加1% v/v柴油的微量盐培养基(MSM)琼脂上进行一次和二次筛选。将潜在细菌接种到含有1% v/v柴油的MSM肉汤中,在37℃下培养20 d,进行柴油降解分析。采用重量法分析柴油降解率,采用标准平板计数法测定细菌细胞密度。然后,根据其形态特征和16S rDNA序列对所选菌株进行鉴定。结果表明,分离菌株6和分离菌株8经过20 d的培养,对柴油的降解率分别为52.29%和39.24%。经16S rDNA序列分析,鉴定为芽孢杆菌菌株UMTFA1 (RB)和克卢氏葡萄球菌菌株UMTFA2 (RS)。研究结果表明,这些菌株在石油降解过程中具有潜在的应用价值,为生物修复过程的研究提供了新的思路,为减少土壤和水体中烃类污染提供了新的思路。
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引用次数: 0
Molecular characterization of Caulerpa racemosa (Caulerpales, Chlorophyta) from Indonesia based on the Plastid tufA Gene 基于质体tufA基因的印尼总状茎叶(Caulerpa racemosa)分子特征分析
Q3 Environmental Science Pub Date : 2021-12-13 DOI: 10.15578/squalen.588
M. Darmawan, N. Zamani, H. Irianto, H. Madduppa
The green seaweed Caulerpa racemosa is  a seaweed  of  high prospect that is being given emphasis by the Indonesian government. However, C. racemosa in Indonesia may include multiple species level-entity exhibiting morphological overlap and require molecular analysis for species identification. Molecular documentation of species richness of indigenous populations of C. racemosa is essential to underpin cultivar development and conservation of the species to avoid overharvesting. The present study aimed to determine the genetic diversity of C. racemosa and document the haplotype network of the specimens from four different locations (Bintan Island, Jepara, Takalar and Osi Island) using the chloroplast tufA gene. Twenty individuals from four areas were collected and amplified with the chloroplast-encoded gene tufA for species identification against publicly available data. The identification of C. racemosa based on the tufA gene showed that the species found in four locations were C. cylindracea (previously C. racemosa var. cylindracea), C. macra (previously C. racemosa var. macra), C. racemosa, and C. oligophylla (previously C. racemosa var. lamourouxii). This study records the existence of C. cylindracea in Takalar and Jepara, Indonesia for the first time. The most diverse C. racemosa species was in Osi Island, where the exploitation of this seaweed is very low. In contrast, the lowest number of C. racemosa varieties were found in Takalar, where exploitation is very high. There were only minor light variations of Caulerpa species in the tufA gene in four different sites with only four haplotypes found, and each haplotype corresponded to another species. 
绿藻总状藻(Caulerpa racemosa)是一种极具发展前景的海藻,受到印尼政府的重视。然而,印度尼西亚的总形虫可能包括多个物种水平的实体,表现出形态重叠,需要进行分子分析以进行物种鉴定。对总形花本地种群的物种丰富度进行分子记录,是培育和保护总形花品种、避免过度采伐的重要依据。本研究旨在利用叶绿体tufA基因确定总状假丝酵母的遗传多样性,并记录4个不同地点(民丹岛、耶帕拉岛、Takalar岛和欧西岛)标本的单倍型网络。从4个地区收集了20个个体,用叶绿体编码基因tufA进行扩增,对照公开资料进行物种鉴定。基于tufA基因对总状菌的鉴定结果表明,在4个地点发现的菌种分别为:圆柱菌(原总状菌)、大毛菌(原总状菌)、总状菌和少叶菌(原总状菌)。本研究首次在印度尼西亚的Takalar和Jepara地区记录了茶树属的存在。总状囊藻种类最丰富的是欧西岛,那里对这种海藻的开发利用很低。相比之下,总状念珠菌品种在塔克拉拉邦的数量最少,而塔克拉拉邦的开发程度很高。在4个不同的位点上,蕨属植物的tufA基因只有轻微的变异,只有4个单倍型,每个单倍型对应于另一个物种。
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引用次数: 4
Characteristics of Irradiated Hydrogel Formulated from Composite i/k-carrageenan Combined with Polyvinyl Alcohol i/k-卡拉胶与聚乙烯醇复合制备辐照水凝胶的特性
Q3 Environmental Science Pub Date : 2021-11-29 DOI: 10.15578/squalen.439
B. Utomo, D. Fransiska, La Ode Sumarlin, Ihya Sulthonuddin
Eucheuma seaweed from tropical waters habitat mainly contains carrageenan, a type of hydrocolloid potential for hydrogel production. This study aims to determine the characteristics of hydrogel formulated from composite i- and k-carrageenan combined with polyvinyl alcohol (PVA) which, could be used further for wound dressing application. The concentrations of composite i/k-carrageenan used were 1.0%, 1.5%, 2.0%, 2.5% and 3.0% w/w, and the PVA concentration was 12.5% w/w. Composite i/k-carrageenan in a proportion of 6:4 by weight. The hydrogel was irradiated using 60Co g-rays with the irradiation dose of 25 and 2 kGy.h-1. The concentration of composite i- and k-carrageenan influenced the gel fraction, water holding capacity, tensile strength, elongation, and surface morphology of the hydrogel. The optimum formula of irradiated composite hydrogel was obtained from 3.0% w/w of composite i/k-carrageenan. The formula had a gel fraction of 61.67%, water holding capacity of  1067.12%, tensile strength of  32.37 x 10-3 MPa, and elongation of  251.67%. Interestingly, the product with the optimum formula had a porous surface morphology and transparency, which are applicable for wound dressing purposes.
来自热带水域的真麒峰藻主要含有卡拉胶,这是一种具有生产水凝胶潜力的水胶体。本研究旨在确定由i-和k-卡拉胶与聚乙烯醇(PVA)复合制成的水凝胶的特性,该水凝胶可进一步用于伤口敷料。复合i/k-卡拉胶用量分别为1.0%、1.5%、2.0%、2.5%和3.0% w/w, PVA用量为12.5% w/w。复合i/k-卡拉胶的重量比为6:4。用60Co g射线照射水凝胶,照射剂量分别为25和2 kGy.h-1。复合i-和k-卡拉胶的浓度影响水凝胶的凝胶分数、持水量、抗拉强度、伸长率和表面形貌。以复合i/k-卡拉胶的质量分数为3.0% w/w,得到了辐照复合水凝胶的最佳配方。该配方凝胶率为61.67%,持水量为1067.12%,抗拉强度为32.37 × 10-3 MPa,伸长率为251.67%。有趣的是,具有最佳配方的产品具有多孔表面形态和透明度,适用于伤口敷料目的。
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引用次数: 0
Nutrient Composition, Antioxidant and Antibacterial Activities of Ulva prolifera O. F. Müller 增生Ulva Ulva prolifera o.f. melller的营养成分及其抗氧化和抗菌活性
Q3 Environmental Science Pub Date : 2021-10-11 DOI: 10.15578/squalen.550
E. Arguelles, Arsenia B. Sapin
Seaweeds are marine organisms capable of producing diverse kinds of chemical compounds with promising pharmacological use. The study evaluated the proximate and elemental composition and the potential antioxidant (using CUPRAC, ABTS+, and DPPH assays) and antibacterial activities (using microtiter plate dilution assay) of Ulva prolifera O. F. Müller. The seaweed has a total phenolic content of 829 ± 2.00 mg GAE/g. Antioxidant efficiency of U. prolifera exerted high ability of reducing copper ions, potent ABTS+ and DPPH scavenging activities in a concentration-dependent manner with IC50 value of 24.7 mg GAE/mL, 43.52 mg GAE/mL, and 54.1 mg GAE/mL, respectively, more effective than ascorbic acid. In vitro antibacterial activity assay showed that U. prolifera exhibited inhibitory activity against bacterial pathogens such as Methicillin-resistant Staphylococcus aureus (MIC = 125 mg/mL), S. epidermidis (MIC = 125 mg/mL), and Pseudomonas fluorescens (MIC = 500 mg/mL). This investigation is the first documented report regarding antibacterial activity of U. prolifera against P. fluorescens. In addition, results showed elemental composition to be in decreasing order of Ca K Mg Na Mn Fe Zn Cu Pb Cd Cr. Proximate composition of U. prolifera showed high carbohydrate and protein content with a percentage composition of 36.20 ± 0.27% and 23.72 ± 0.31% (dry weight), respectively. This study is the first report in the Philippines that shows the potential of U. prolifera as an excellent candidate organism as source of chemical compounds with relevant application to the pharmacological industry.
海藻是一种能够产生多种化合物的海洋生物,具有良好的药理作用。该研究评估了Ulva prolifera O. F. m ller的近似值和元素组成以及潜在的抗氧化活性(使用CUPRAC, ABTS+和DPPH测定)和抗菌活性(使用微滴板稀释法)。总酚含量为829±2.00 mg GAE/g。其对铜离子的还原能力、ABTS+的清除能力和DPPH的清除能力均呈浓度依赖性,IC50值分别为24.7 mg GAE/mL、43.52 mg GAE/mL和54.1 mg GAE/mL,均优于抗坏血酸。体外抑菌活性试验表明,该菌对耐甲氧西林金黄色葡萄球菌(MIC = 125 mg/mL)、表皮葡萄球菌(MIC = 125 mg/mL)、荧光假单胞菌(MIC = 500 mg/mL)等病原菌均有抑制作用。本研究是首次文献报道关于增殖杆菌对荧光假单胞菌的抗菌活性。元素组成以Ca、K、Mg、Na、Mn、Fe、Zn、Cu、Pb、Cd、Cr依次递减,碳水化合物和蛋白质含量较高,占干重的比例分别为36.20±0.27%和23.72±0.31%。该研究是菲律宾第一个报告,显示了U. prolifera作为一种极好的候选生物作为化合物来源的潜力,并在药理学工业中有相关的应用。
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引用次数: 4
Occurrence and Source Apportionment of Polycyclic Aromatic Hydrocarbons (PAHs) in Green Mussel (Perna viridis) from Cilincing Waters of Jakarta Bay, Indonesia 印尼雅加达湾沿岸绿贻贝(Perna viridis)中多环芳烃(PAHs)的赋存状态及来源分析
Q3 Environmental Science Pub Date : 2021-05-24 DOI: 10.15578/SQUALEN.484
D. Yogaswara, Tri Partono, A. Satya
Green mussels (Perna viridis) as sedentary organisms have been adopted as bioindicators in the marine environment for many decades. They have been potentially affected by anthropogenic activity and organic contaminants such as polycyclic aromatic hydrocarbons (PAHs) in an aquatic environment. This study aims to determine concentration, distribution and potential sources of PAHs in green mussel biomass obtained from Cilincing waters, Jakarta Bay. Fresh green mussels were collected from aquaculture facilities at Cilincing waters of Jakarta Bay with various size categories of shell length and were extracted with solvent n-hexane-dichloromethane mixture using Soxhlet method. The concentrate of sample extract was purified using silica gel/sodium sulfate anhydrous with n-pentene-DCM effluent in fractionation. Finally, the purified sample was injected into the GC-MS instrument. The result showed that the highest concentration of total PAH (TPAH) was 126.47 ng.g-1 wet weight (ww), founded in the guts from the biggest group of green mussel (length of 6.00 to 7.99 cm), and     3-aromatic rings were predominantly detected in all group sizes of green mussel. The result of the   LMW/  HMW and diagnostic binary ratio indicated that PAH contamination is caused by a mixed source of petrogenic and pyrogenic processes. It may be due to the presence of oil spilled and petroleum waste from shipyard and cargo activities and atmospheric deposition. Based on excess cancer risk (ECR) value and the concentration level of PAH carcinogenic according to National Agency of Drug and Food Control (BPOM) regulation, PAH level in green mussels are acceptable and minor negative impact due to typical human consumption. Nevertheless, it needs to be circumspect to exploiting green mussels as seafood resources for daily consumption due to the carcinogenic content.
绿贻贝(Perna viridis)作为一种定居生物,在海洋环境中被用作生物指示物已有几十年的历史。它们可能受到人为活动和水生环境中多环芳烃(PAHs)等有机污染物的影响。本研究旨在确定雅加达湾Cilincing水域青贻贝生物量中多环芳烃的浓度、分布和潜在来源。从雅加达湾Cilincing水域的水产养殖设施中采集不同大小、不同壳长的新鲜青贻贝,用溶剂正己烷-二氯甲烷混合物采用索氏法提取。用硅胶/无水硫酸钠与正戊烯- dcm出水分馏提纯样品萃取物浓缩液。最后,将纯化后的样品注入气相色谱-质谱仪。结果表明,总多环芳烃(TPAH)的最高浓度为126.47 ng。最大群青贻贝(长度为6.00 ~ 7.99 cm)内脏中G-1的湿重(ww)和3-芳香环在各大群青贻贝中均有显著分布。LMW/ HMW和诊断二元比结果表明,多环芳烃污染是由产岩和热生混合源引起的。这可能是由于来自船厂和货物活动以及大气沉积的溢油和石油废物的存在。根据美国国家药品和食品管理局(BPOM)规定的过量致癌风险(ECR)值和多环芳烃致癌物浓度水平,绿贻贝中的多环芳烃水平是可以接受的,并且由于典型的人类食用而产生的负面影响很小。然而,由于青贻贝的致癌性,将其开发为日常食用的海鲜资源需要谨慎。
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引用次数: 0
Back Cover Squalen Bulletin Vol. 16 No. 1 Tahun 2021 封底角鲨公报第16卷第1期Tahun 2021
Q3 Environmental Science Pub Date : 2021-05-24 DOI: 10.15578/squalen.v16i1.563
Squalen Bulletin
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引用次数: 0
Optimization of Chitosan Concentration on The Quality and Shelf Life of Frozen Rohu (Labeo rohita) Fillets 壳聚糖浓度对冷冻罗虎鱼片品质及保质期的影响
Q3 Environmental Science Pub Date : 2021-05-24 DOI: 10.15578/SQUALEN.504
Faria Afrin, M. Rasul, Murshida Khan, T. Akter, Chunhong Yuan, A. K. Shah
A natural product such as chitosan promotes health benefits and extends the shelf life of the processed products. Chitosan has been used as a food additive due to its antioxidant and antimicrobial activities. This study was conducted to optimize the chitosan concentration as a coating agent on the quality and shelf life of Labeo rohita fillets during frozen storage. Chitosan (CH) solutions were prepared with 0.5 %, 1 %, and 2 % (w/v) CH in 1 % (v/v) glacial acetic acid for coating application. The control (0% CH) and CH treated fish fillets were stored at -18 °C for 14 weeks and assessed for chemical (pH, thiobarbituric acid reactive substances (TBARS), total volatile basic nitrogen (TVB-N), and K-value), microbiological (aerobic plate count (APC)), and sensory properties. The pH, TBARS, and K-value of 1 % and 2 % CH treated fish fillets were acceptable up to 14th week of storage, while TVB-N value was permissible up to 12th week of  storage.  After 14th  week of  storage, the APC of control, 0.5 %, 1 %, and 2 % CH treated fillets were 7.18 log CFU/g, 5.02  log CFU/g, 4.13 log CFU/g, and 3.21 log CFU/g, respectively. The  fish  fillets treated with 1 % and 2 % CH had acceptable sensory attributes up to 12th week, while control fillets were unacceptable after the 6th week of storage. This study demonstrated that 1% CH could be used as a natural additive for keeping the quality and extending the shelf life of L. rohita fillets during frozen storage.
像壳聚糖这样的天然产品对健康有益,并延长加工产品的保质期。壳聚糖因其抗氧化和抗菌活性而被用作食品添加剂。以壳聚糖为包衣剂,研究了壳聚糖的浓度对罗氏Labeo rohita鱼片冷冻贮藏质量和保存期的影响。在1% (v/v)冰醋酸中分别添加0.5%、1%和2% (w/v)的CH,制备壳聚糖(CH)溶液用于涂层。对照鱼片(0% CH)和经CH处理的鱼片在-18°C下保存14周,评估化学(pH、硫代巴比妥酸活性物质(TBARS)、总挥发性碱性氮(TVB-N)和k值)、微生物(好氧平板计数(APC))和感官特性。1%和2% CH处理过的鱼片的pH值、TBARS值和k值在储存14周之前是可以接受的,而TVB-N值在储存12周之前是允许的。贮藏14周后,对照、0.5%、1%和2% CH处理鱼片的APC分别为7.18、5.02、4.13和3.21 log CFU/g。经1%和2% CH处理的鱼片在12周前的感官属性尚可接受,而对照鱼片在6周后的感官属性不可接受。本研究表明,1% CH可作为天然添加剂,在冷冻贮藏过程中保持罗氏肉片的品质并延长其保质期。
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引用次数: 3
Front Cover Squalen Bulletin Vol. 16 No. 1 Tahun 2021 封面角鲨公报第16卷第1期Tahun 2021
Q3 Environmental Science Pub Date : 2021-05-24 DOI: 10.15578/squalen.v16i1.561
Bulletin Squalen
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引用次数: 0
Bioactive Compounds, Cosmeceutical And Nutraceutical Applications of Green Seaweed Species (Chlorophyta) 绿色海藻的生物活性化合物、药妆和营养保健应用
Q3 Environmental Science Pub Date : 2021-05-24 DOI: 10.15578/SQUALEN.514
Prof. Muhammad Taher, Ph.D, Fatin Syazwani Ruslan, D. Susanti, N. Mohammad Noor, N. Aminudin
Seaweeds are valuable marine plants that have garnered much attention from the public due to their high bioactive, nutrients and minerals content. Seaweeds have been used in multiple applications, including in cosmeceutical, nutraceutical and pharmaceutical industries. Nevertheless, this review will focus on the bioactive compounds of Chlorophyta and their potential application in nutraceutical and cosmeceutical industries. Chlorophyta are believed to possess a significant amount of nutrients and minerals, sufficient to meet the daily requirements of nutrients and minerals in the human body.  Considering the nutritional aspect, deficiency in nutrients may lead to severe ailments, including heart disease, neurological disorder and cancer. The main compounds studied in this review are polysaccharides, proteins, amino acids, lipids, fatty acids, pigments, minerals, vitamins and secondary metabolites. Among all, polysaccharides are the most exploited compounds and used in many advanced applications in the nutraceutical and cosmeceutical industries. This review also offers insights into the beneficial biological properties of Chlorophyta, highlighting their potential in cosmeceutical and nutraceutical applications. Further research is required to highlight the Chlorophyta sp. aquaculture, its extraction method, and the most targeted bioactive compounds from the species. Therefore, the challenge is to increase public awareness of the promising application of this species in the nutraceutical and cosmeceutical  industries.
海藻是一种珍贵的海洋植物,因其具有很高的生物活性、营养和矿物质含量而受到公众的广泛关注。海藻被广泛应用于药妆、营养和制药等行业。本文将对绿藻的生物活性成分及其在营养保健和药妆工业中的潜在应用进行综述。绿藻被认为含有大量的营养物质和矿物质,足以满足人体每天对营养物质和矿物质的需求。考虑到营养方面,营养缺乏可能导致严重的疾病,包括心脏病、神经紊乱和癌症。本文研究的主要化合物有多糖、蛋白质、氨基酸、脂类、脂肪酸、色素、矿物质、维生素和次生代谢物。其中,多糖是开发最多的化合物,在营养保健和药妆工业中有许多先进的应用。本文综述了绿藻的有益生物学特性,重点介绍了其在药妆和营养保健方面的应用潜力。需要进一步的研究来强调绿藻的养殖,其提取方法,以及从该物种中最具针对性的生物活性化合物。因此,挑战在于提高公众对该物种在营养保健和药妆工业中有前途的应用的认识。
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引用次数: 5
Heat Resistance of Candidate Probiotic Enterococcus faecalis R22B in Different Matrices 候选益生菌粪肠球菌R22B在不同基质中的耐热性
Q3 Environmental Science Pub Date : 2021-04-16 DOI: 10.15578/SQUALEN.497
S. Lestari, R. Rinto, I. Wahyuni, S. Ridhowati, W. Wulandari
Fermented fish, including rusip and bekasam , contains lactic acid bacteria, some of which have probiotic properties. Considering the beneficial effect, the count of viable cells in probiotic carrier foods must be at least 10 6 CFU/g throughout the product shelf-life. The processing and storage condition significantly affect the viability of probiotics in carrier foods. This research was conducted to determine the heat resistance of probiotic candidate Enterococcus faecalis R22B isolated from rusip in three different media: bekasam, rusip, and physiological saline solution (NaCl 0.85%). E. faecalis R22B was heated in each medium at a temperature of 70 °C for 0, 2, 4, 8, and 12 min. The media characteristics showed differences within the parameters included pH values of 4.41-6.99; a w 0.67-0.92; moisture content 72.56-98.09%; ash content 0.69-12.32%; protein content 0-14.7%; fat content 0-0.84%; and carbohydrate content from 0-4.93%. The results showed that the difference in the heating medium had no significant effect ( p >0.05) on the heat resistance of the bacteria, as indicated by the D 70 value. The required average heating time at 70 o C to decrease E. faecalis R22B cells by 1log 10 (D 70 value) in bekasam, rusip, and physiological saline media were 3.17, 3.29, and 3.55 min, respectively. Despite having a lower D T -value, the reduction of bacteria cells in three media heated at 70 o C showed no difference ( p >0.05); therefore, bekasam and rusip are suitable for probiotic carrier food.
发酵的鱼,包括rusip和bekasam,含有乳酸菌,其中一些具有益生菌特性。考虑到益生菌的有益作用,在整个产品保质期内,益生菌载体食品中的活菌数量必须至少为10.6 CFU/g。加工和贮存条件对载体食品中益生菌的活力有显著影响。研究了从芦笋中分离的候选益生菌粪肠球菌R22B在3种不同培养基(bekasam、rusip和生理盐水溶液(NaCl 0.85%)中的耐热性。粪肠杆菌R22B在70℃的温度下分别在不同的培养基中加热0、2、4、8、12 min。培养基特性在pH值为4.41 ~ 6.99范围内存在差异;A w 0.67-0.92;含水率72.56-98.09%;灰分0.69-12.32%;蛋白质含量0-14.7%;脂肪含量0-0.84%;碳水化合物含量0-4.93%。结果表明,加热介质的不同对细菌的耐热性无显著影响(p >0.05),如d70值所示。在bekasam, rusip和生理盐水培养基中,在70℃下加热使粪肠杆菌R22B细胞减少1log10 (d70值)所需的平均时间分别为3.17,3.29和3.55 min。在70℃加热条件下,3种培养基中细菌细胞的还原量虽较低,但差异无统计学意义(p >0.05);因此,bekasam和rusip是益生菌的载体食品。
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引用次数: 0
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Squalen Bulletin of Marine and Fisheries Postharvest and Biotechnology
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